Features
Improving the Predictability of RF/DSP Transmitter Design
By Cory Edelman
For a great many wireless data applications, orthogonal frequency division multiplexing (OFDM) is the modulation scheme of choice. However, the high crest factors inherent in OFDM can make it tricky to design. Here’s how an integrated cosimulation approach can yield better results than those obtained using only behavioral simulation.
An HDSL2 Primer
By Jim Quilici
Like the original high bit-rate digital
subscriber line (HDSL) standard, HDSL2 offers symmetric data rates of 1.544 Mbps. Unlike HDSL, which requires two wire pairs, HDSL2 operates over a single pair. This article discusses the challenges involved in obtaining these data rates while operating over a single pair.
Burst Modem Design Techniques, Part 2
By Steve Gardner
Burst modems are commonly used in GSM and IS-136 cellular phones, VSAT terminals, and
packet data networks. This second in a two-part series considers some of the many possible algorithms that can be used in a burst receiver.
Digital Processing in the IF Domain
By Matt Easley
Radio receiver design — traditionally an analog stronghold — is gradually going digital. The availability of high-speed DSPs allows for the implementation of a digital intermediate frequency state. One such
implementation is discussed here.
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